标题:SNR Improvement of QEPAS System by Preamplifier Circuit Optimization and Frequency Locked Technique
作者:Zhang, Qinduan; Chang, Jun; Wang, Zongliang; Wang, Fupeng; Jiang, Fengting; Wang, Mengyao
作者机构:[Zhang, Qinduan; Chang, Jun; Wang, Fupeng; Jiang, Fengting; Wang, Mengyao] Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Shandong, Peoples R C 更多
通讯作者:Chang, Jun
通讯作者地址:[Chang, J]Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Shandong, Peoples R China;[Chang, J]Shandong Univ, Shandong Prov Key Lab Laser Technol 更多
来源:PHOTONIC SENSORS
出版年:2018
卷:8
期:2
页码:127-133
DOI:10.1007/s13320-018-0468-y
关键词:QEPAS system; preamplifier circuit; frequency locked method; noise; optimization
摘要:Preamplifier circuit noise is of great importance in quartz enhanced photoacoustic spectroscopy (QEPAS) system. In this paper, several noise sources are evaluated and discussed in detail. Based on the noise characteristics, the corresponding noise reduction method is proposed. In addition, a frequency locked technique is introduced to further optimize the QEPAS system noise and improve signal, which achieves a better performance than the conventional frequency scan method. As a result, the signal-to-noise ratio (SNR) could be increased 14 times by utilizing frequency locked technique and numerical averaging technique in the QEPAS system for water vapor detection.
收录类别:EI;SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045398789&doi=10.1007%2fs13320-018-0468-y&partnerID=40&md5=fdfd5e52ad711cd93b863369b3933780
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